Who We Are


In 2013, Eric, John & Tammy met and quickly became friends. The friendship led to a business partnership. John & Tammy’s business experience along with Eric’s passion and knowledge of the window cleaning industry, make this partnership the perfect fit. Excited to grow a new business, they co-created Advanced Window Cleaning. Providing excellent customer service to the community of the Grand Valley is of the upmost importance to them – from the first call into the office to the final walkthrough with the technician. They always strive to do it the Advanced way.

Our Mission

Our mission at Advanced Window Cleaning is to build lasting relationships with our customers by providing them excellent customer service.  We are dedicated to hiring knowledgeable & friendly staff who thrive on providing excellent customer service and who are committed to doing the job right the first time.


Our Team

Tammy Hershberger

Tammy Accounting/HR

Tammy grew up dreaming of owning her own business. Having been the first in her family to go to college, she has since made this dream a reality and now owns two successful businesses.

Tammy who is a owner, is committed to running her businesses the same way she lives her life: with honesty, integrity and a passion and desire to give 100% to everything she does.

You will find Tammy in the office managing the bookkeeping, running the office, and dreaming up ways to grow the company and her team.

Eric Lammers

Eric Sales

From an incredibly young age, Eric has loved cleaning windows alongside his dad in their family-owned business in Arizona. Now, nearly two decades later, he still loves cleaning windows with his own company here in Colorado.

Eric who is a owner, is known for his hard work, his integrity, and how he takes pride in every job he does. Eric enjoys watching the excitement of each customer when they see a job well done.

You will find Eric out in the field doing bids and assisting on each job as our production manager and listening to podcasts as he enjoys learning new ways to grow his business and make it run more efficiently.

John Hershberger

John Maintenance Coordinator

John is one of our owners and helps with maintenance of our equipment. John works part time for our company as he is also an owner of another local business. John’s positive attitude and problem-solving skills makes him invaluable to our company.

John can be found at the shop maintaining our equipment and boosting our morale with a smile and his infectious love of to laugh & enjoy life.

Amelia Swartzentruber

Amelia Lead Tech

Amelia is one of our window cleaning technicians. Amelia’s positive attitude, service with a smile and work ethic make her fit right in with our team. When not working, Amelia likes to travel, go to church and spend time with her boyfriend.

You will find Amelia working in the field daily as our lead technician in training. Amelia supervises and helps with window cleaning, power washing, solar panel cleaning & gutter cleaning jobs.

Monica of Advanced Window Cleaning

Monica Office Administrator

Monica is a mom of two and recently moved to Grand Junction. She enjoys hiking and the beautiful views that Grand Junction has to offer. In her free time she stays busy renovating her new home and playing with her two fur babies.

Susan Office Administrator

My name is Susan Nazario and I was born in San Francisco, CA. I was raised in the Bay Area of CA and have lived in Grand Junction for 10 years. I grew up visiting the Grand Valley, as this is where a lot of my family is from and where we hold our family reunions. I have 3 daughters all who were born here in Grand Junction. In my free time I enjoy taking my girls on hikes, swimming in the river, or trying new places to eat. We enjoy travelling around Colorado to new places we haven’t been. In the winter months we like to hang at home and cook lots of yummy soups and stews to keep us warm.

Justin Assistant Tech

I have a beautiful son who I love to ride bikes with and play at the park with. I enjoy reading my Bible and books to help me grow spiritually. And I am a foodie, I love good flavorful food and fun experiences.

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